I ordered ABM single bridge tuners & headpiece from Thomann but the headpiece was listed wrongly as it doesn't accommodate double ballend strings so I sent them back, however the quality was great. I then sourced an ETS bridge & tailpiece and a Status headpiece, also great quality & has really improved my Yamaha BBN5, now the B string (actually drop A) is fine where it wasn't great before, I can only attribute this to the increased mass of the hardware ....
my 2cy